Level and plumb.



PATENTED MAY 24, 1904.

v A. J. PATTERSON.

LEVEL AND PLUMB.

APPLICATION FILED MAR. 17, 1904.

N0 MODEL.

WITNESSES:

' UNITED STATES- Patented May 24, 1904.

PATENT ()FFICE.

LEVEL AND PLUMB,

SPECIFICATION forming part of Letters Patent No.7 60,91'7, dated May 24,1904.

Application filed March 17,1904.

bined levels and plumbs; and the invention consists in certain novelconstructions and combinations of parts, as will be hereinafterdescribed and claimed.

In the drawings, Figure 1 is a perspective view of alevel embodyingmyinvention. Fig.

2 is a longitudinal section of the middle portion thereof, showing therecess for the hob and the stock adjusted to an inclined position.

Fig. 3 is a similar section to Fig. 2 with the stock adjusted to serveas aplumb. Fig. 4 is a cross-section on about line I 4 of Fig. 1. Fig. 5is a cross-section on about line 5 5 of Fig. 3. Fig. 6 is a detailperspectiveyiew of the bob or pendulum, and Fig. 7 is a detail topplanview of the graduated plate.

In the construction shown the stock A is provided centrally with arecess A, in which operates the bob or'pendulum B and above which issecured the graduated plate C, having a central slot 0 graduated onopposite sides to indicate different angles to the horizontal.

As shown, the graduations are on aseparate plate 0 secured to the stock,and-this construction is employed when the stock is made of wood. Ifdesired, however, the stock may be made of metal. The graduationsinclude a central zero-point and numbers running in oppositedirectionstherefrom and operating to indicate different angles to which the levelmay be applied and to indicate an,v desired angles at which it may bedesired to place a beam or other structure. Above and intersecting therecess A. the stock is provided with a transverse opening D, having anopening or slot D for the pointer of the bob or weight and a line D toindicate, in connection with said pointer,when the stock is arrangedplumb or in a vertical position. Side openings are provided at a and (0,extending from Serial No. 198,540. (No model.)

side to side of the stock, through which the pointer may be seen, asbest shown in Figs. 1,2,3,and4.- a

The bob or pendulum B is pivoted at B within the recess A, has a pointerB above the pivot B and a weight B below said pivot, such weight beingprovided at its lower side with the oppositely-facing shouldersb and bwhich abut, respectively, against pins E and e to stop the pendulum inthe position shown in Fig. 2 or in that shown in Fig. 3, the saidstop-pins E and a being so arranged that the pointer or indicating-arm Bof the pendulum or bob does not engage with the stops E and e, or eitherof them, in any adjustment of the bob, so that there is no dangerwhatever of the pointer or indicating-arm being deflected to any degreeby contact with the stop de vices; but such stopping is effectedentirely I as a plumb-bob.

In Fig. 4: I show the special means for offecting the pivotal support ofthe bob or pendulum. This includes lateral pivot-pins b, projecting fromthe opposite sides of the pendulum and entering elongated sockets f,formed in the inner ends of screws F, turned through the sides of thestock, as will be understood from Figs. 1 and 4t. Thesocketsf' 5 are ofuniform diameter and extend for a considerable distance into the screwsin such manner as to form long bearings of uniform diameters for thepins on opposite sides of the pendulum or bob. This form of bearing issimple, durable, avoiding wear on the parts, and when once adjusted willlast for a long time without requiring any adjustment Whatever.

The construction of the level as an entirety is simple, convenient foruse, and will be accurate and durable, as will be understood from thedrawings and the foregoing description.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

The improvement in levels herein described, comprising a stock providedwith a recess for the bob or pendulum, and in the same with cross-pinsfor stopping the bob in different positions and having above said recessa curved graduated face, said stock being also provided with a tranverseopening for use in indicating a vertical line, the bob or pendulumhaving laterally-projecting pivot-pins of uniform diameter and alsohaving the indicating pointer or arm, and the weight below the inglongitudinally and made of a uniform di-' ameter throughout and adaptedto receive the pivot-pin on the bob or pendulum, substantially as setforth.

ANDREW J. PATTERSON.

Witnesses: 7

WM. 0. HAMAKER, WM. R. (300K.

